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See all on Wikipediahttps://en.wikipedia.org/wiki/MigmatiteMigmatite is a composite rock found in medium and high-grade metamorphic environments, commonly within Precambrian cratonic blocks. It consists of two or more constituents often layered repetitively: one layer is an older metamorphic rock that was reconstituted subsequently by partial melting … See more
Migmatite is the penultimate member of a sequence of lithology transformations first identified by Lyell, 1837. Lyell had a clear perception of the regional diagenesis sequence in sedimentary rocks that remains valid today. … See more
A leucosome is the lightest-colored part of migmatite. The melanosome is the darker part, and occurs between two leucosomes or, if remnants of the more or less unmodified parent rock (mesosome) are still present, it is arranged in rims around these remnants. … See more
In 1795 James Hutton made some of the earliest comments on the relationship between gneiss and granite: “If granite be truly stratified, and … See more
Recent geochronological studies from granulite-facies metamorphic terranes (e.g. Willigers et al. 2001) shows that metamorphic temperatures remained above the granite solidus for between 30 and 50 My. This suggests that once formed, anatectic … See more
The role of partial melting is demanded by experimental and field evidence. Rocks begin to partially melt when they reach a combination of … See more
Wikipedia text under CC-BY-SA license- https://fr.wikipedia.org/wiki/Migmatite
Une migmatite (du grec : "migma", mélange), parfois appelée gneiss granitisé ou anatexite, est une roche métamorphique qui résulte majoritairement d'une anatexie. On la trouve dans des zones de gradient métamorphique moyen à élevé . Les migmatites sont constituées, à l'échelle de l'affleurement, d'un mélange de roches au taux de fusion très variable, depuis le protolithe jusqu'au …
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- https://de.wikipedia.org/wiki/MigmatitSee more on de.wikipedia.orgNach Mehnert (1968) werden Migmatite nach vier Gefügeelementen unterschieden: 1. Das Paläosom ist derjenige Anteil eines Migmatits, der nicht der partiellen Aufschmelzung unterlag und daher die genetisch älteren Feststoff-Phasen des Gesteins beinhaltet. Dennoch kann das Paläosom während der Aufschmelzung …
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- https://en.wikipedia.org/wiki/Magnetite
WebMagnetite is a mineral and one of the main iron ores, with the chemical formula Fe2+Fe3+2O4. It is one of the oxides of iron, and is …
- Crystal system: Isometric
- https://it.wikipedia.org/wiki/MigmatiteSee more on it.wikipedia.orgIl termine è stato introdotto dal petrologo finlandese Sederholm nel 1907, per descrivere rocce del cratone scandinavo nella Finlandia meridionale. Deriva dal greco μιγμα (migma), che significa mescolamento, per l'intima mescolanza di due litotipidi origine differente.
- Categoria: Roccia metamorfica
- https://cs.wikipedia.org/wiki/Migmatit
WebMigmatity (z řeckého migma – směs) jsou přeměněné horniny složené ze dvou složek, granitové a rulové. Nejčastěji mívají podobu páskovaných rul. Vyskytují se při okrajích granitových intruzí nebo v zónách nejvyššího …
- https://en.wiktionary.org/wiki/migmatite
Webmigmatite ( plural migmatites ) ( geology) Any rock of mixed appearance, being an intimate mixture of granite and older rock, specifically from intense metamorphism which partially …
- https://pt.wikipedia.org/wiki/Migmatito
WebMigmatito é uma rocha ígnea / metamórfica originada de uma rocha da família dos granitóides que, após passar por um processo de fusão parcial e recristalização desse …
- https://sk.wikipedia.org/wiki/Migmatit
WebJe to proces blízky metamorfnej diferenciácií až čiastočnému nataveniu ( anatexia ). K týmto procesom dochádza často na okrajoch granitových intruzí alebo v zónách …
- https://www.wikiwand.com/en/Migmatite
WebMigmatite is a composite rock found in medium and high-grade metamorphic environments. It consists of two or more constituents often layered repetitively; one layer …
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